
How Humans Cause Mass Extinctions
Aug 12, 2015 & warn that overpopulation and overconsumption are killing off species at an alarming rate.
Anne H. Ehrlich is the associate director and policy coordinator of the Center for Conservation Biology, Stanford University.
Aug 12, 2015 & warn that overpopulation and overconsumption are killing off species at an alarming rate.
Nearly three months after Russia launched its invasion, Western countries appear more committed than ever to Ukraine’s defense, and, in some quarters, to Russia’s defeat. We asked PS commentators what outcome the West, Russia, and Ukrainians themselves can realistically expect.